Schedule 160 pipe dimensions: OD, wall thickness, ID and weight
Deskely Completions team Singapore
Schedule 160 is the heaviest numbered schedule in ASME B36.10M. It is mostly used in small sizes, for high pressure and high temperature service.
The chart below gives every size in schedule 160, from NPS 1/2 to 24: outside diameter, wall thickness, inside diameter and the weight of plain-end carbon steel pipe, in mm and inches.
- Sch 160 is a wall thickness that changes with size: 8.74 mm on NPS 2, 13.49 mm on NPS 4.
- The outside diameter is fixed for each NPS, so a heavier schedule only changes the bore.
- Typical use: high pressure steam.
- Weights are for plain-end carbon steel; stainless steel is about 2 percent heavier.
Schedule 160 pipe chart
Click a size for every schedule of that size. Dimensions are nominal, per ASME B36.10M.
| NPS | DN | OD mm (in) | Wall mm (in) | ID mm (in) | kg/m (lb/ft) |
|---|---|---|---|---|---|
| 1/2 | 15 | 21.3 (0.840) | 4.78 (0.188) | 11.74 (0.462) | 1.95 (1.31) |
| 3/4 | 20 | 26.7 (1.050) | 5.56 (0.219) | 15.58 (0.613) | 2.90 (1.95) |
| 1 | 25 | 33.4 (1.315) | 6.35 (0.250) | 20.70 (0.815) | 4.24 (2.85) |
| 1-1/4 | 32 | 42.2 (1.660) | 6.35 (0.250) | 29.50 (1.161) | 5.61 (3.77) |
| 1-1/2 | 40 | 48.3 (1.900) | 7.14 (0.281) | 34.02 (1.339) | 7.25 (4.87) |
| 2 | 50 | 60.3 (2.375) | 8.74 (0.344) | 42.82 (1.686) | 11.11 (7.47) |
| 2-1/2 | 65 | 73 (2.875) | 9.53 (0.375) | 53.94 (2.124) | 14.92 (10.02) |
| 3 | 80 | 88.9 (3.500) | 11.13 (0.438) | 66.64 (2.624) | 21.35 (14.34) |
| 4 | 100 | 114.3 (4.500) | 13.49 (0.531) | 87.32 (3.438) | 33.54 (22.54) |
| 5 | 125 | 141.3 (5.563) | 15.88 (0.625) | 109.54 (4.313) | 49.12 (33.01) |
| 6 | 150 | 168.3 (6.625) | 18.26 (0.719) | 131.78 (5.188) | 67.57 (45.40) |
| 8 | 200 | 219.1 (8.625) | 23.01 (0.906) | 173.08 (6.814) | 111.27 (74.77) |
| 10 | 250 | 273.1 (10.750) | 28.58 (1.125) | 215.94 (8.502) | 172.34 (115.81) |
| 12 | 300 | 323.8 (12.750) | 33.32 (1.312) | 257.16 (10.124) | 238.69 (160.39) |
| 14 | 350 | 355.6 (14.000) | 35.71 (1.406) | 284.18 (11.188) | 281.72 (189.30) |
| 16 | 400 | 406.4 (16.000) | 40.49 (1.594) | 325.42 (12.812) | 365.38 (245.52) |
| 18 | 450 | 457 (18.000) | 45.24 (1.781) | 366.52 (14.430) | 459.39 (308.70) |
| 20 | 500 | 508 (20.000) | 50.01 (1.969) | 407.98 (16.062) | 564.85 (379.56) |
| 24 | 600 | 610 (24.000) | 59.54 (2.344) | 490.92 (19.328) | 808.27 (543.13) |
Mill tolerances apply, and the pipe specification and purchase order for your project take precedence over this chart.
How to work out the inside diameter and weight
The inside diameter is the outside diameter minus twice the wall thickness. The weight per metre of plain-end carbon steel pipe is:
W (kg/m) = 0.0246615 x (OD - t) x t, with OD and wall thickness t in mm. For NPS 4 Sch 160: 0.0246615 x (114.3 - 13.49) x 13.49 = 33.54 kg/m.
Where Sch 160 pipe is used
High pressure steam, hydraulic and process lines, small-bore instrument and drain connections on high pressure systems.
XXS (double extra strong) is thicker than schedule 160 up to NPS 6, and thinner from NPS 8 up.
Every schedule in one chart
To compare schedules side by side, or look up a size in any schedule, use the full pipe schedule chart. Other schedules:
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Frequently asked questions
What is the wall thickness of Sch 160 pipe?
It depends on the size. NPS 1/2: 4.78 mm, NPS 1: 6.35 mm, NPS 2: 8.74 mm, NPS 4: 13.49 mm, NPS 6: 18.26 mm, NPS 8: 23.01 mm, NPS 12: 33.32 mm. See the chart for every size.
What is the inside diameter of 2 inch Sch 160 pipe?
42.8 mm (1.686 in), from an outside diameter of 60.3 mm and a wall of 8.74 mm.
How much does 4 inch Sch 160 pipe weigh?
33.54 kg/m (22.54 lb/ft) for plain-end carbon steel.
How does Sch 160 compare with other schedules?
XXS (double extra strong) is thicker than schedule 160 up to NPS 6, and thinner from NPS 8 up.
Is the outside diameter the same for every schedule?
Yes. For each NPS the outside diameter is fixed so that fittings and flanges fit; only the wall thickness and so the bore change with the schedule.
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